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May 29, 1923.

H. P. HOYLE SCREENING APPARATUs Filed July 25, 1922 e Sheets-Sheet 1 r u v 7 J'IIIIIIIZZIIIIIIIIIL.

V iwiml I y INVEN'IOR HENRY PATRICK HOYLE B hls AtLor'neys 53% Vii/1 1M May 29, 1923.

H. P. HOYLE S CREENING APPARATUS iled July 26 1922 a Sheets-Sheet 2 INVENTOR iBaodemvw HENRY PATR ICK BOYLE Bv his Attorneys,

May 29, 1923 1,456,801

H. P. HOYLE SCREENING APPARATUS Filed July 26. 1922 s Sheets-Sheet 5 INVENTOR HENRY PATRICK HOYLE By his Attorneys,

Emm W 24- May 29, 1923.

H. P. HOYLE SCREENING APPARATUS Filed July 26. 1922 6 Sheets-Sheet 4 INVENTOR HENRY PATRICK HOYIE By his Attorneys,

May 29, 1923.

H. P. HOYLE SCREENING APPARATUS Filed July 26 1922 6 Sheets-$heet 5 INVENTOR 1 HENRY YV'PATRICK HOYLE By his Afiborneys,

May 29, 1923.

H. F. HOYLE SCREENING APPARATUS Filed July 26 1922 6 Sheets-Sheet i I l INVENTOR HENRY PATRICK HOYLE By his Attorneys Patented May 29, 1923.

UNITED STATES HENRY PATRICK HOYLE. OF DURHAM, ENGLAND.

SCREENING APPARATUS.

Application filed July 26, 1922.

To all whom it may concern:

Be it known that T, HENRY PATRICK HoYLn, a subject of the King of Great Britain, residing at 46 North Bailey, Durham England, have invented newand useful Tmprovements in and Relating to Screening Apparatus, of which the following is a specification.

This invention relates to screening apparatus and has for its object to provide means for imparting a vibratory motion to the screening surface.

According to his invention the screening surface has imparted to it a vibratory movement by arms engaging the screening surface and actuated by eccentrics on a shaft. Preferably the eccentric portions of the shaft are formed with their axes in line, which line passes through the centre pointof the axis of the portion of the shaft between the eccentric portions. The arms are mounted perpendicularly to the common axis of the eccentric portions and at each revolution of the shaft the screening surface receives an up and down movement combined with a crosswise movement. The eccentrics are preferably set at an angle of 180 to each other.

In one embodiment of the invention the shaft is mounted in bearings below the screening surface and on the eccentric portions-of the shaft are other bearings mounted upon which is a hollow sleeve carrying the arms. I

The screening surface is secured to side clamping bars which are secured to side arms bolted to supports having trunnions held in clamps secured to the fixed frame by bolts. The supports may be connected together by a bar upon which the bearings of the shaft are mounted. Preferably the side bars to which the screening surface is secured are connected to the ends of levers pivoted upon adjustable pivots to the side arms, whilst the other ends of the levers on each side of the screening surface are connected together in pairs, which arrangement permit-s of a crosswise movement of the screening surface, such movement being limited by springs attached to the levers.

The accompanying drawings show screening apparatus made in accordance with this invention.

Serial No. 577,741.

Figure l is a plan view of part of the apparatus.

Figure 1 is a plan View of the other part thereof.

Figure 2 is a transverse section of part of the apparatus, and

Figure 2 is a transverse section of the other part thereof.

Figure 3 is an end elevation.

Figures l and 5 correspond to Figures 2 and and show modifications.

Figure 6 is a plan view of a part of another :form of apparatus.

Figure 6 is a plan view of the other part thereof.

Figure 7 is a longitudinal section on the line 7 of Figure 6. t

Figure 7 is a longitudinal section on the line 7 of Figure 6.

Figure 8 is a transverse line S--S of Fig. 6.

Figure 9 shows diagrammatically the eecentrics at the ends of the shaft.

In Figures L to 3, the screening surface a is secured to side clamping bars Z) by bolts 0 and the side bars b are secured by link plates (Z (Z and bolts 6 to eye-bolts f secured to arms 9 by nuts it. The arms 9 are bolted to supports 2' having trunnions j held in clamps 7i: secured to the fixed frame Z by bolts m, whereby the arms 9 and screening surface a can be held in any desired position. The supports are connected together by a bar a. On the bar a are bearings 0 supporting a shaft p which extends through and has a bearing in the trunnion j on the right hand side of the screen. This shaft may be turned by a belt and pulley or other convenient means. On the shaft p are eccentric portions 1 9 set at an angle of 180 to each other. A hollow sleeve 7- is carried by bearings a mounted on the eccentric portions 9 and to the ends of the sleeve 1 are attached arms 25 at the ends of which are strips of wood e which extend along and are in contact with the underside of the screening surface a. \Vhen the shaft 7) is turned the eccentric portions 9 Q cause the arms t to be raised and lowered thus imparting a vibratory motion to the screen a.

In the modification shown in Figure 4, the side bars 6 are shown bent back upon each other so forming a space in which the screensection on the ing surface a is inserted and secured by bolts 0. The side bars 6 are connected to the eyebolts 7 by links 00. In place of one arm t on the sleeve r, twin arms 3 1 are provided.

Figure 5 shows a screen similar to that shown in Figure 3 except that the screening surface is sloped towards "its centre line as shown.

In Figures 6 toS, the screening surface a is secured to side bars 6 by bolts 0 and the side bare 5 pass around studs A on levers B mounted on pivots C adjustably secured. by scre'u' s D and nuts hi to the arms 9 which are bolted to supports i having trunnions as before.

The levers B are connected togetherin pairs on opposite sides of the screening surface a by chains F, the tension of which can be adjusted by bolts G and nuts H.

This arrangement permits of crosswise movement of the screening surface, such movement being limited by springs J, see Figure 7.

The supports are connected together by a bar a and on the bar a are bearings 0 supporting a shaft p which extends through and has a bearing in the trunnion j on the right hand side of the screen. This shaft may be turned by a belt and pulley or other convenient means. On the shaft p are eccentric portions (1 9 set at an angle of 180 to each other. The axes of the eccentric portions g Q are in a line with each other and pass through the centre point K of the axis of the portion of the shaft 39 between the portions g g as shown in Figure 9. A hollow sleeve 9" is carried by bearings s mounted perpendicularly to the common axis of the eccentric portions 5/ and to the ends of the sleeve 7* are attached arms 2? at the ends of which are strips of wood 41 which extend along and are in contact with the underside of the screen ing surface a. l Vhen the shaft 2) is turned the eccentric portions g 9 cause the arms 6 to impart to the screen a an up and down movement combined with a crosswise movement. This twofold movement produces more effective screening than a single movement only, the material being continually separated by the upward throw and compelled to take a longer or zig-zag path on its passage down screen, owing to the crosswise movement.

What I claim 1. The combination of a screening surface with arms, bars on the arms extending across and engaging the screening surface and positive means for moving the arms an appreciable distance away from and towards the screening surface.

2. The combination of a screening surface with arms engaging the screening surface and positive means for moving the arms an appreciable distance away from and towards and also crosswise of the screening surface.

shaft and formed with their axes in a line which passes through the centre point of the axis of theportion of the shaft between the eccentrics.

6. The combination of a screening surface with arms engaging the screening surface, a shaft, eccentrics 011 the shaft, hearings on the eccentrics and a sleeve mounted on the bearings and carrying the arms.

7. The combination of a screening surface with arms engaging the screening surface, a shaft, eccentrics spaced apart on the shaft and formed. with their axes in a line which passes through the centre point of the axis of the portion of the shaft between the eccen trics, hearings on the eccentrics and a sleeve mounted on the bearings and carrying the arms.

8. A screen attached to side arms connected together by a bar, bearings mounted upon the bar, a shaft turning in the bearings, eccentric portions on the shaft, other bearings on the eccentric portions, a hollow sleeve mounted upon the latter bearings and arms on the hollow sleeve engaging with the screening surface of the screen.

9. The combination of a screen frame, side arms fixed to the frame, side bars secured to the side arms, a screening surface secured to the side bars, other arms, bars on the latter arms extending across and engaging the screening surface and positive means for moving the arms an ap1.ireciable distance away from and towards the screening surface. 7

10. The combination of a screen frame, side arms fixed to the frame, side bars sccured to the side arms, a screening surface secured-to the side bars, arms engaging the screening surface and positive means for moving the arms an appreciable distance away from, towards and also crosswise of the screening surface.

11. The combination of a screen frame. side arms fixed to the frame, side bars secured to the side arms, a screening surface secured to the side bars, a bar connecting to=--- gether the supports, bearings on the bar, a shaft turning in the bearings, eccentrics spaced apart on the shaft and arms on the eccentrics adapted to engage the screening surface.

12. The combination of a screen frame, side arms fixed to the frame, side bars secured to the side arms, a screening surface secured to the side bars. a bar connecting together the supports, hearings on the bar, a shaft turning in the bearings, eccentrics spaced apart on the shaft, bearings on the eccentrics, and a sleeve mounted in the bearings and carrying arms adapted to engage the screening surface.

13. The combination of a screen frame, side arms fixed to the frame, side bars secured to the side arms, a screening surface secured to the side bars, a bar connecting together the supports, bearings on the bar, a shaft turning in the bearings, eccentrics spaced apart on the shaft and formed with their axes in a line which passes through the centre point of the axis of the portion of the shaft between the eccentrics, and arms on the eccentrics adapted to engage the screening surface.

14. The combination of a screen frame, side arms fixed to the frame, side bars secured to the side arms, a screening surface secured to the side bars, a bar connecting together the supports, hearings on the bar, a shaft turning in the bearings, eccentrics spaced apart on the shaft and formed with their axes in a line which passes through the centre point of the axis of the portion of the shaft between the eccentrics, bearings on the eccentrics, and a sleeve mounted in the bearings and carrying arms adapted to engage the screening surface.

15. The combination of a screen frame, side arms fixed to the frame, levers pivoted to the side arms, side bars connected to the ends of the levers, a screening surface sccured to the side bars, and connections joining the other ends of the levers on opposite sides of the screen in pairs, arms engaging the screening surface and means for moving the arms away from and towards the screening surface.

16. The combination-of a screen frame, side arms fixed to the frame, levers pivoted to the side arms, side bars connected to the ends of the levers, a screening surface secured to the side bars, and connections joining the other ends of the levers on opposite sides of the screen in pairs. arms engaging the screening surface and means for moving the arms away from, towards and crosswise of the screening surface.

17. The combination of a screen frame, side arms fixed to the frame, levers pivoted to the side arms, side bars connected to the ends of the levers, a screening surface secured to the side bars. connections joining the other ends of the levers on opposite sides of the screen in pairs, a bar connecting together the supports, bearings on the bar, a shaft turning in the bearings, eccentrics spaced apart on the shaft, and arms on the eccentrics adapted to engage the screening surface.

l8. The combination of a screen frame, side arms fixed to the frame, levers pivoted to the side arms, side bars connected to the ends of the levers, a screeningsurface secured to the side bars, connections joining the other ends of the levers on opposite sides of the screen in pairs, a bar connecting together the supports, hearings on the bar, a shaft turning in the bearings, eccentrics spaced apart on the shaft, bearings on the eccentrics, a sleeve mounted in the bearings and carrying arms adapted to engage the screening surface.

19. The combination of a screen frame. side arms fixed to the frame, levers pivoted to the side arms, side bars connected to the ends of the levers, a screening surface secured to the side bars, connections joining the other ends of the levers on opposite sides of the screen in pairs, a bar connecting together the supports, hearings on the bar. a shaft turning in the bearings, eccentrics spaced apart on the shaft and formed with their axes in a line which passes through the centre point of the axis of the portion of the shaft between the eccentrics, and arms on the eccentrics adapted to engage the screening surface.

20. The combination of ascreen frame. side arms fixed to the frame, levers pivoted to the side arms, side bars connected to the ends of the levers, a screening surface secured to the side bars, connections joining the other ends of the levers on opposite sides of the screen in pairs, at bar connecting together the supports, bearings on the bar, a shaft turning in the bearings, eccentrics spaced apart on the shaft and formed with their axes in a line which passes through the centre point of the axis of the portion of the shaft between the eccentrics, bearings on the eccentrics, a sleeve mounted in the, bearings and carrying arms adapted to engage the screening surface.

21. The combination of a screening surface with arms. bars on the arms extending acrossand engaging the screening surface, and positive means for moving the arms an appreciable distance away from and towards and also crosswise of the screening surface.

22. The combination of a screening surface with arms, bars on the arms extending across and engaging the screening surface, a shaft, and eccentrics on the shaft, which eccentrics move the arms away from and towards the screening surface.

23. The combination of a screening surface with arms, bars on the arms extending across and engaging the screening surface, a shaft, and eccentrics on the shaft, which eccentrics move the arms away from, towards and also crosswise of the screening surface.

24. The combination of a screening surface with arms, bars on the arms extending across and engaging the screening surface, a shaft and eccentrics on the shaft and set at an angle oflSO to each other, which eccentrics move the arms away from, towards and also crosswise of the screening surface.

25. The combination of a screening surface with arms, bars on the arms extending across and engaging the screening surface, a shaft, and eccentrics on the shaft and set at an angle of 180 to each other, which eccentrics move the arms away from and towards the screening surface.

26. The combination of a screening surface Witharms engaging the screening surface, a shaft, and eccentrics on the shaft and set at an angle of 180 to each other, which eccentrics move the arms away from and towards the screening surface.

27. The combination of a screening sur I face with arms engaging the screening surface, a shaft, and eccentrics on the shaft and set at an angle of 180 to each other, which eccentrics-move the arms away from, towards and also crosswise of the screening surface.

28. The combination of a screei'iing surface With arms engaging the screening surface, a shaft and eccentrics set at an angle of 180 to each other, spaced apart on the shaft, and formedwith their axes in a line which passes through the center point of the axis of the portion of the shaft between the eccentrics.

29. The combination of a screening sui face with arms engaging the screening surto the side arms, side bars connected to the ends of the levers, a screening surface secured to the side bars, connections joining the other ends of the levers on opposite sides of the screen in pairs, springs adapted to iimit the movement of the pivoted levers, arms engaging the screening surface and means for moving the arms away from and towards the screening surface.

31. The combination of a screen frame, side arms fixed to the frame, levers pivoted to the side arms, side bars connected to the ends of the levers, a screening surface se cured to the side bars, connections joining the other ends of the levers on opposite sides of the screenin pairs, springs adapted to limit the movement of the pivoted levers,

arms engaging the screening surface and means for moving the arms away from, to wards and crosswise of the screening sur face,

82. The combination of a screen frame, side arms fixed to the frame, levers pivoted to the side arms, side bars connected to the ends of the levers, a screening surface secured to the side bars, connections joining other ends of the levers on opposite sides of the screen in pairs, springs adapted to limit the movement of the pivoted levers, a bar connecting together the supports, hearings on the bar, a shaft turning in the bearings, eccentrics spaced apart on the shaft, hearings on the eccentrics, and

sleeve mounted in the bearings and carry-i ing arms adapted to engage the screening surface.

In testimony that I claim the foregoing as my invention I have signed my name this 7th day of July, 1922.

HENRY PATRICK HOYLE. 

